The chief executives of four services contractors said Tuesday the market isn't getting easier, but their private-equity ownership has proved helpful. The heads of Altamira Technologies, Novetta Solutions, Salient CRGT and PAE appeared at a panel hosted by Houlihan Lokey. All four of the companies are owned by private-equity firms and have made acquisitions in recent years. The CEOs outlined a number of challenges they face in the market, from hiring key talent to differentiating themselves. Brad Antle, CEO of...